Analysis of information sources in references of the Wikipedia article "Silicon dioxide" in English language version.
These soft-focus pigments, mainly composed of polymers, micas and talcs covered with rough or spherical particles of small diameters, such as silica or titanium dioxide, are used to optically reduce the appearance of wrinkles. These effects are obtained by optimizing outlines of wrinkles and reducing the difference of brightness due to diffuse reflection.
The silica is a multiporous ingredient, which absorbs the oil and sebum.